davis



Feb.'27, 1923. n 1,446,965 5 Y T. `Linen/ls GRATE FOR SINTERING APPARATUS Filed sept. 2:5, l1992 5 shams-sheer, 1`

Feb. 27, 1923. -f 1,446,965

T. J. DAVIS GRATE FOR SINTERING APPARATUS Filed Sepb. 25, 1922 5 sheets-sheet 2 Wine-S585. 1720?? i071;

2Q@ @P0/M6 JMW@ Feb. 27, 1923. 1,446,965

y T. J. DAVIS GRATE FOR SINTERING APPARATUS Filed Sept.. 23, 1922 y b Sheena-sheet 3 l? 5 f7 /1 gr f7 f5? 9 www@ l Feb. 27, 1923. 1,446,965

T. J. DAVISY GRATE FOR SINTERING APPARATUS Filed Sept. 25, 1922 b sheeLs-s'heet 4 Feb, 27, 1923.

T. J. DAVIS GRATE FOR SINTERING APPARATUS Filed sept. 2s, 1922 `b sheets-sheet; 5

Permite res; a?, iaaa UNITE rre PArsN'ry Fries.

rnoiviiis'i; niivis, or iiUeUiisNn, rniinsrnvnnin. n

- "enzi'rn non siiwrnniivo arrennmns.

Application tiled September '23, 1922. Sierial No. 590,104.

To all wliomimay conce/rn.' y Be it known that l, THOMAS J. Dil-vis, acitizen of the United States, andy resident of Duquesne, in `the county of Allegheny. kand State of Pennsylvania, have invented certain new yand useful improvements in (il-rates for Sintering Apparatus, of which the following is avspecification. n ,c

This invention relates to grateaand while not limitedthereto, iskparticularly adapte-il y to grates tory use in sintering apparatus, used in sintcring blast furnace tlue dust, iron ores, and other finely divided materials.

In sintering flue dust, irony ores, etc., the grates of 'the sintering apparatus become clogged more or less with-clinler, cinder,

ctc. After the apparatus has 'been tiltedto' is tilted from a horizontal position, 'and to automatically return fto alinement when the grate is returnedy tol a horizontal posi--y tion.

l A further,objecte isv to providea grate in.

which the swinging 5ba-rs .are removable, thus r permitting them tovbe readily'replaced `it they becomedainaged. i n l These and other ycbjeotsxand advantages will be more clearlybrought out in the following specification and claims, and illustrated in the accompanying drawings, in which: f 'n Figure l is a top yplan of a sinteringipan partly broken away, and having some of the gratos in position. n. i *y Figure 2 is a longitudinal sectional side* elevation onthe liney II-II of Figure 1Q [Figure 3 .is ,a sectional elevation on the line Hlllof'V Figure 1.y -f

Figure l isacrosssection through the' sin-Q i tering pan, showing it in tilted or discharging position, and showing-the swinging grate bars swung out of alinement with the fixed bars. c

Figure 5 isa cross section'through one oit' theggrate sections.

Figure 6 is a cross section of' one of' the grate sections on the line Vil-Vl voi" Figuren 5, showing ,they swinging grate bars swung of the section. i i

Figure? is a, plan of slightly modified grate members, constructed for use with sintering apparatus of the Dwight-Lloyd type. Figure 8 is a sectional. elevation on the line l.7llll-l7ll l of Figure'y `7.

or, tilted ont ot' alinenient with the fixed bars Figure 9 is a transverse sectional elevation oit one oi' the grates ofv'lligure 7.

In'the accompanying drawings, the nunieral Q designates.y a sintering pan which arranged 'to tilt or rock 'about a horizontal axis, opposite ends of this pan being lpro- .vided withfhollow trunnions 3, 3, by which the aan is rotatably mounted in `,suitable i u bearings.l n l y The pan Zhas abottom 5, sides 6, 6, and iinteorall.T formed ends 7 the hollow trun- I nions l3, 3, opening intothe` pan through the .end walls-of the pan. lil-it aiiintermedt ate point `in theheight ofthe side walls ot the pan is 'a series oit' grate sections 8, con.-

ystructed in accordancewith this ,invention` The grate sections ,S are supportedvertically by transversegirder supportsQ.

rllhe outer lends of `the hollow trunnions 8, 3 are connected to one end of suitable conduits l0, which kare adapted to have their other ends lconnected toen exhausting de rice (not shown) for creatingsuction-'there by drawing the gaseous products orcoinbus` tion through the: grate sections 8, and' along the pa-nbeneath the grate.'

lhegirders have apertures l2 in theirl web portion to provideior suction or draft along the entire length of thesintering pan. kThe grate sections 8 are rectangular KAin shape, andare Varranged iiiv a.. number; of

series, longitudinally of the pan. The' end grate section.;"of' each series issecured to the `ends of the pan in'any suitable manner andthe intermediate sections are each intcry locked with each other and supports 9,as at 14. i

Each grate section S comprisesa rectangular trarney portion 'll having plurality of with the gir-der fixed grate bars 16 formedintegrally there` ISO with and spaced apart a distance greater' than their width. Other `bars 17 of the saine cross sectional areas as the bars 116, are mounted in the spaces between the bars 16 for pivotal movement on a pivot bar 1S, which is mounted considerably to one side of the transverse center of the grate: sections so that the grate bars 17 are pivoted beyond their horizontal aXis. Therefore, when the pan is tilted to discharge the sintered mass, the grate bars 17 will swing'l outwardly by gravity. 4

The grate ba-rs 17 are provided with S or ogee curve shaped bearing slots 18?I eX- tending into the bars from the lower :tace thereof to receive thepivot bar 18. rlhe slots 118, due toA their novel shape, :torina secure mounting of' the grate bars17 on the pivot bar, which permits ready remo al wnen desired, permitsiree rotation of the grate bars on the pivot bar, and prevents accidental displacement of' the grate bars.

rllhe bars 16 and 17 are provided with suitable spacing bosses or shoulders 19 around the bea-ringslots 18 to hold the bars in suitable spaced relation.

' The bars 16 and 17 are substantially nianiond shaped in cross section, being beveled or tapered suddenly from a point above their longitudinal axis toward the center of their top face, and being tapered gradually from the bottom edge of! the upper bevel, downwardly toward the center of their bottom tace.

The end walls ot the 'traine portion 15 of the grate sections are beveled along their upper edges as at 20, and tapered downy'ardly from the lower edge of the bevel as at 21. The end oliy the pivoted grate bars (nearest the pivot bar 18) is cut away as at 22 to allow such end to swing clear ot the end ol1 the frame 15, while the other end is toi-med with a projection 23 overlapping the beveled portion 2O of the adjacent end ot the trame 15, and adapted to Contact therewith when the grate bars'are in horizontal positiointhereby supportingthe bars 17 in alinement with the bars 16.

Suitable centering lugs 23 are provided on each side of thepivotedbars 17. These lugs 23a are adapted to strike the beveled upper faces of' the adjacent'ined bars 16 as the pivoted bars swing! down into alinement with the iiXed bars, thus serving to guide or center the bars asY they are seated.

The grate bars 116 and 17"lcei1ig ofthe same cross sec-tional air-ea and heldin spaced' relation by the spacing bosses 19, it will be ap parent that equi-.distant spaces are formed between each of' the bars 1'6" and 17 to provide for a draft through the grate sections, while the sintering operation is going on.

The modifiedl grate constructionshown in Figures 7 and 8 is particularly designed* for continuous sintering machines of the Dwight and Lloyd type and comprises a rectangular frame member 25 having a plurality of lixed grate bars 26 formed integrally therewitl and spaced apart a greater distance than their width. Other grate bars 27 of the same cross sectional area the bars 2G, are mounted in the spaces between the bars 26 for pivotal movement on a pivot bar 28, which is mounted considerably to one side of the transverse center of the grate sections, so that the grate bars 27 are pi-voted beyond their horizontal axis. Therefore, when the pan or pallet is tilted to discharge the sintered mass the grate bars 27lwill swing outwardly by gravity.

rlhe grate bars 27 are provided with S or ogee curve shaped bearing slots 29 extend ing into the bars 'from the'l lower face thereor' to receive they pivot bar 28. rEhe slots 29,

due to their novel shape, 'form asecure mounting of the grate bars 27 on the pivot bar, which permits ready removal when de sired, permits iree rotation ofthe grate bars on the pivot bar, and prevents accidental displacement of the graterbars;

The grate bars 26 and 27 are provided with spacing bossesor shoulders 30 around they bearing slots 29V to 'hold the bars. in suitable spaced relation.

Centering lugs 31, provided on each side ot the pivoted gra-te bars 27, are adapted to strike thev upper side edges ot the fixed grateibars 961 as the pivoted barsswing down into alinement with the fixed bars, thus serving to guide or center the pivoted bars as they are seated."

The front side (that is the side nearest the pivotbar 28) of the frame member 25 is provided with a flange 331 whichextends un* der the grate bars 26- and 27 and i'sspaced an appreciable distance therefrom. The iiange 33 is adapted to form a stop against which the. short end of the swingingf'bars strike when they move outwardly to discharge the sintered mass. i

Tl'io gratos of Figure 7 are shown in p40-- sition in a pallet offa continuoussintering apparatus which comprises an integrally cast member having sides connectedl by spaced webs 36= and provided with? axle spindies 37 on which are mounted wheelsf38 adapted to travel on a suitablev track (not shown). y

lt will be noted that the grate sectionsare mounted so as to rest directly o n thewebs 26. and these webs serve to prevent tliepi-voted bars 27 from moving' inwardly or downwar lt will; o cou-rse, be understood that; this invention is not liijn-itedto` grat-es fon sintering apparatus, nor t'al; grate composedjf sections, since it` is adaptedfto other`A `uses and may be madeas' an :integral grateorin sections,A as desired',` sincel e'a-ch'sectin' is-.in reality a grate complete in itself.

The operation of the grate will be readily Aunderstood. As said grate is tilted or turned rate bars ue to ofl j beyond the vertical, the pivoted will swing about the pivot bar, center mounting of said grate lbars on the pivot. Thev swinging of the grate bars Will dislodge any @linker or other matter lodged in the openings betvveen the bars, and Will also provide openings of sufiicient Width to allow the escape or any matter collected in the pan 2, below the grates. f

l. A grate having a plurality of bars, some of said bars being movable and adaptedto vmove out or" alinement with the other of said bars when said grate is tilted, said movable bars being removable. 2. Agrate having a plurality of parallel bars, some of said bars being rigid 'and other of said bars being'pivoted, said pivoted bars'r being free to svving outof alinement vvithy said rigid bars when said grate is tilted7 said pivoted bars being removable. f p

3. A gratek comprising a frame portion, a plurality of alternating iixed and pivoted bars Within said frame portion, a pivot,`

member on which `said pivoted 'barsy v,are

' mounted, and said pivoted bars' being pron vided with substantially ogeey curved bear# ing slots for the reception of said pivot niember. y

4. A grate section comprising a `frame member having a plurality of ixed bars formed integralthereWith, a pivotmember ik mounted in said frame at a point t'o one side of the transverse center of said grate'seo- 7 mounted in said :trame ata point to the one side of the transverse center of said grate section, and movable bars provided With ogee curve shapedr slots opening from their lower faces to receive said pivot member, saidbars f being arranged between said xed bars, and

being adapted to swing out of alinement With ysaid fixed bars when said grate section is tilted. e f

` 6. A grate section comprising a frame, a

kplurality of fixed grate bars, a pivot bar,

and plurality of pivoted` grate bars removably mounted on said pivotbar.

7. In a'grate section a frame, a pivot bar, and aplurality of pivoted grate ,bars mounted on said pivot bar,'said grate bars being provided with ogeecurved bearing slots eX- tending upwardly from their lower face to receive said pivot bar. e

8. In a grate section comprising a frame, aplurality of fixed grate bars and a pivot bar, a plurality of pivoted grate bars mounted on saidl pivot bar, each of said pivoted grate bars being provided with an 'ogee curved slot for the reception of said pivot bai-,and means for limiting thev movement of 'said bars 1n one direction.

In testimony whereof, I

have hereunto set my hand.

yTHOMAS J. DAVIS. y 

